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Simulation Practice and Theory最新文献

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Evaluation of process controller fault tolerance using simulation 基于仿真的过程控制器容错性评估
Simulation Practice and Theory Pub Date : 2000-03-15 Epub Date: 2000-05-05 DOI: 10.1016/S0928-4869(00)00009-4
Jan Hlavička , Stanislav Racek , Pavel Herout
{"title":"Evaluation of process controller fault tolerance using simulation","authors":"Jan Hlavička ,&nbsp;Stanislav Racek ,&nbsp;Pavel Herout","doi":"10.1016/S0928-4869(00)00009-4","DOIUrl":"10.1016/S0928-4869(00)00009-4","url":null,"abstract":"<div><p>The paper presents a study of several alternatives of a fault-tolerant process controller design. We compare controller architectures based on different amount of hardware redundancy with those using time redundancy. The system behaviour is evaluated by means of a process-oriented simulation model enabling software injection of faults. As an overall measure of controller design quality (which includes both performance and reliability) we use the numerical error of the output. The results obtained on the model are used to show the dependence of the output error upon the relative speed of computation and upon the rate of faults damaging the data. Thus for every set of parameters, a system configuration which gives the best results, can be determined.</p></div>","PeriodicalId":101162,"journal":{"name":"Simulation Practice and Theory","volume":"7 8","pages":"Pages 769-790"},"PeriodicalIF":0.0,"publicationDate":"2000-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0928-4869(00)00009-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74444808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 13
Artificial neural networks in vibration control of rotor-bearing systems 人工神经网络在转子-轴承系统振动控制中的应用
Simulation Practice and Theory Pub Date : 2000-03-15 Epub Date: 2000-05-05 DOI: 10.1016/S0928-4869(00)00004-5
Yaagoub N. Al-Nassar, Mohsin Siddiqui, Ahmed Z. Al-Garni
{"title":"Artificial neural networks in vibration control of rotor-bearing systems","authors":"Yaagoub N. Al-Nassar,&nbsp;Mohsin Siddiqui,&nbsp;Ahmed Z. Al-Garni","doi":"10.1016/S0928-4869(00)00004-5","DOIUrl":"10.1016/S0928-4869(00)00004-5","url":null,"abstract":"<div><p>A neural network controller is described and implemented for controlling the vibration of a rotor-bearing system. A multi-layered neural network is used to model the inverse dynamics or the rotor-bearing system on-line. It is learnt by a backpropagation algorithm, and a delta rule, in which the difference between the actual control input to the plant, which is generated from the neural controller, and the input estimated from the inverse-dynamics model by using an actual plant output, is minimized. The results show a satisfactory diminished response of the rotor-bearing system when the controller is applied to the system.</p></div>","PeriodicalId":101162,"journal":{"name":"Simulation Practice and Theory","volume":"7 8","pages":"Pages 729-740"},"PeriodicalIF":0.0,"publicationDate":"2000-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0928-4869(00)00004-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88527813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Index 指数
Simulation Practice and Theory Pub Date : 2000-03-15 Epub Date: 2000-05-05 DOI: 10.1016/S0928-4869(00)00016-1
{"title":"Index","authors":"","doi":"10.1016/S0928-4869(00)00016-1","DOIUrl":"https://doi.org/10.1016/S0928-4869(00)00016-1","url":null,"abstract":"","PeriodicalId":101162,"journal":{"name":"Simulation Practice and Theory","volume":"7 8","pages":"Pages 791-794"},"PeriodicalIF":0.0,"publicationDate":"2000-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0928-4869(00)00016-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136850652","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Simulation and analysis of the interior permanent magnet synchronous motor as a brushless AC-drive 内部永磁同步电机无刷交流驱动的仿真与分析
Simulation Practice and Theory Pub Date : 2000-02-15 Epub Date: 2000-02-21 DOI: 10.1016/S0928-4869(99)00030-0
H. Madadi Kojabadi , G. Ahrabian
{"title":"Simulation and analysis of the interior permanent magnet synchronous motor as a brushless AC-drive","authors":"H. Madadi Kojabadi ,&nbsp;G. Ahrabian","doi":"10.1016/S0928-4869(99)00030-0","DOIUrl":"10.1016/S0928-4869(99)00030-0","url":null,"abstract":"<div><p>In the present paper the behavior of the interior permanent magnet synchronous motor (IPMSM) fed by a current controlled voltage source inverter under static and dynamic conditions is presented. A method is explained, which estimates the rotor position angles and rotating speeds at several conditions by measuring the instantaneous values of stator voltages and currents. The estimator is an extended Kalman filter (EKF). The simulation results under four different dynamic conditions, namely the starting, loading of the motor, reversing of speed, and starting with unknown initial rotor position value, are presented.</p></div>","PeriodicalId":101162,"journal":{"name":"Simulation Practice and Theory","volume":"7 7","pages":"Pages 691-707"},"PeriodicalIF":0.0,"publicationDate":"2000-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0928-4869(99)00030-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87619758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 20
Simplified function generators based on fuzzy-logic interpolation 基于模糊逻辑插值的简化函数生成器
Simulation Practice and Theory Pub Date : 2000-02-15 Epub Date: 2000-02-21 DOI: 10.1016/S0928-4869(99)00031-2
Granino A Korn
{"title":"Simplified function generators based on fuzzy-logic interpolation","authors":"Granino A Korn","doi":"10.1016/S0928-4869(99)00031-2","DOIUrl":"10.1016/S0928-4869(99)00031-2","url":null,"abstract":"<div><p>We replace the classical procedure for recursive linear interpolation with a technique based on simple fuzzy-set logic. This approach makes it much easier to construct multi-input interpolation procedures. The resulting function generators produce the same output as the classical formulas with slightly fewer CPU cycles if we precompute and store some coefficients before the simulation. Lin and Zhang's algorithm [K.-C. Lin, B. Zhang, Simulation 68 (3) (1997) 157–163], which precomputes and stores more interpolation-polynomial parameters, is even faster but requires much more runtime storage in the case of large function tables.</p></div>","PeriodicalId":101162,"journal":{"name":"Simulation Practice and Theory","volume":"7 7","pages":"Pages 709-717"},"PeriodicalIF":0.0,"publicationDate":"2000-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0928-4869(99)00031-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77313055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Simulation of particle coarsening with iteration function systems 用迭代函数系统模拟粒子粗化
Simulation Practice and Theory Pub Date : 2000-02-15 Epub Date: 2000-02-21 DOI: 10.1016/S0928-4869(99)00032-4
Fernando Soares Lameiras
{"title":"Simulation of particle coarsening with iteration function systems","authors":"Fernando Soares Lameiras","doi":"10.1016/S0928-4869(99)00032-4","DOIUrl":"10.1016/S0928-4869(99)00032-4","url":null,"abstract":"<div><p>The tool of iteration function systems (IFS) was explored to simulate particle coarsening. This approach avoids assumptions like the mean field and the continuity equation for the particle size distribution. The stochastic character of the transport of mass, growing and dissolving of particles was taken into consideration. Studies of the interface-controlled and diffusion-controlled coarsening are presented. The usual theoretical asymptotic characteristics of particle coarsening were obtained, although the resulted size distributions showed differences that should be investigated. The IFS seems to be a powerful tool to simulate complex coarsening cases in a more simple way than other approaches.</p></div>","PeriodicalId":101162,"journal":{"name":"Simulation Practice and Theory","volume":"7 7","pages":"Pages 719-728"},"PeriodicalIF":0.0,"publicationDate":"2000-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0928-4869(99)00032-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88515303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Methodology for rapid identification and collection of input data in the simulation of manufacturing systems 制造系统模拟中快速识别和收集输入数据的方法学
Simulation Practice and Theory Pub Date : 2000-02-15 Epub Date: 2000-02-21 DOI: 10.1016/S0928-4869(99)00020-8
T. Perera, K. Liyanage
{"title":"Methodology for rapid identification and collection of input data in the simulation of manufacturing systems","authors":"T. Perera,&nbsp;K. Liyanage","doi":"10.1016/S0928-4869(99)00020-8","DOIUrl":"10.1016/S0928-4869(99)00020-8","url":null,"abstract":"<div><p>Computer simulation is a well-established decision support tool in the manufacturing industry. The rapid development and deployment of simulation models however, are inhibited by factors such as inefficient data collection, lengthy model documentation, and poorly planned experimentation. Typically, more than one third of project time is spent on identification, collection, validation, and analysis of input data. Whilst most research work has been focused on statistical techniques for data analysis, less attention has been paid to the development of systematic approaches to input data gathering. This paper presents a methodology for rapid identification and collection of input data in batch manufacturing environments. A functional module library and a reference data model, both developed using the IDEF (Integrated computer aided manufacturing DEFinition) family of constructs, are the core elements of the methodology. The paper also identifies the major causes behind the inefficient collection of data.</p></div>","PeriodicalId":101162,"journal":{"name":"Simulation Practice and Theory","volume":"7 7","pages":"Pages 645-656"},"PeriodicalIF":0.0,"publicationDate":"2000-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0928-4869(99)00020-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76998570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 109
A comparative evaluation of DRE integration algorithms for real-time simulation of biologically activated sludge process 实时模拟生物活性污泥过程的DRE集成算法的比较评价
Simulation Practice and Theory Pub Date : 2000-02-15 Epub Date: 2000-02-21 DOI: 10.1016/S0928-4869(99)00015-4
Mieczyslaw Metzger
{"title":"A comparative evaluation of DRE integration algorithms for real-time simulation of biologically activated sludge process","authors":"Mieczyslaw Metzger","doi":"10.1016/S0928-4869(99)00015-4","DOIUrl":"10.1016/S0928-4869(99)00015-4","url":null,"abstract":"<div><p>An activated sludge process is considered in this work for comparative tests of new integration algorithms. Based on the configuration of the process and on the process kinetics for heterotrophic bacterial growth, the mathematical model of the considered process has been derived in the form of a state ordinary differential equation system. The state ordinary differential equation system describing the considered process may be both stiff and non-stiff for operator's control changes of the oxygen feeding flow rate. In the work, new discrete response equivalent (DRE) integration algorithms are proposed for simulation runs with a fixed integration step size, which is independent of the process dynamics (this possibility is due to self-adaptive features of the algorithms). The proposed algorithms have been compared with most other frequently used integration algorithms. The comparative tests show that, among the compared algorithms, only the DRE integration algorithms may be used with a fixed, arbitrarily chosen integration step size for simulation of the state ordinary differential equation system which may be both stiff and non-stiff during simulation.</p></div>","PeriodicalId":101162,"journal":{"name":"Simulation Practice and Theory","volume":"7 7","pages":"Pages 629-643"},"PeriodicalIF":0.0,"publicationDate":"2000-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0928-4869(99)00015-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81517257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 17
Construction, mathematical description and coding of reactive lattice-gas cellular automaton 反应格-气体元胞自动机的构造、数学描述与编码
Simulation Practice and Theory Pub Date : 2000-02-15 Epub Date: 2000-02-21 DOI: 10.1016/S0928-4869(99)00029-4
Jon-Paul Voroney , Anna T. Lawniczak
{"title":"Construction, mathematical description and coding of reactive lattice-gas cellular automaton","authors":"Jon-Paul Voroney ,&nbsp;Anna T. Lawniczak","doi":"10.1016/S0928-4869(99)00029-4","DOIUrl":"10.1016/S0928-4869(99)00029-4","url":null,"abstract":"<div><p>We construct a reactive lattice-gas cellular automaton (LGCA) for reaction–diffusion systems and provide extensive discussion of its software coding aspects. The software coding aspects provide rationale for some choices in the construction of LGCA which has been inspired by molecular dynamics. Portability of the C language source code, of the data structures, and of the data formats is discussed and explained. We illustrate the ideas behind the development of LGCA and its code by considering a particular reacting system, the Sel'kov model with immobile complexing species. We demonstrate usefulness of LGCA modelling of reactive systems by presenting various simulation results. We compare these results with the standard numerical simulations of reaction–diffusion equations. We conclude the paper by discussing how LGCA methodology can be applied and extended to other contexts.</p></div>","PeriodicalId":101162,"journal":{"name":"Simulation Practice and Theory","volume":"7 7","pages":"Pages 657-689"},"PeriodicalIF":0.0,"publicationDate":"2000-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0928-4869(99)00029-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82060233","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Bond graph modeling from an object oriented modeling point of view 从面向对象建模的角度进行键合图建模
Simulation Practice and Theory Pub Date : 1999-12-15 Epub Date: 2000-01-12 DOI: 10.1016/S0928-4869(99)00027-0
W. Borutzky
{"title":"Bond graph modeling from an object oriented modeling point of view","authors":"W. Borutzky","doi":"10.1016/S0928-4869(99)00027-0","DOIUrl":"10.1016/S0928-4869(99)00027-0","url":null,"abstract":"<div><p>Along with an ever increasing model complexity, a so-called <em>object oriented</em> approach to physical systems modeling has become more and more popular throughout the last few years. Frequently used keywords are <em>multi-domain modeling</em>, <em>model reuse</em>, and <em>non-causal equations</em>. On the other hand the physical systems modeling methodology based on bond graphs has been in use worldwide since Paynter devised bond graphs more than 35 years ago. It seems that due to different roots and a different terminology, aspects of one of the two approaches are not fully appreciated by those who adhere to the other modeling paradigm. By relating features of object-oriented modeling (OOM) to corresponding ones of the older bond graph methodology, it is pointed out what both modeling approaches have in common and what is different. As a working modeling language, <em>Modelica</em> is used since it seems that this object oriented modeling language is going to receive an increasing attention as a neutral exchange format between proprietary modeling tools. As an application example that combines the electrical, the hydraulic and the mechanical energy domain in a single system, a hydraulic drive with a controlled displacement pump is considered.</p></div>","PeriodicalId":101162,"journal":{"name":"Simulation Practice and Theory","volume":"7 5","pages":"Pages 439-461"},"PeriodicalIF":0.0,"publicationDate":"1999-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0928-4869(99)00027-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88458539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 45
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